Never threaten anyone, especially your kids. Calmly explaining that every action has consequences, explaining the consequences for poor performance and then following through on those consequences is one of the toughest parts of being a Dad. Often I feel like I am the one being punished for the actions of my children. I remind myself that this is the curse of being a grown up.

If you don't want to cancel the trip, you could let your daughter know that she will be doing homework while she is at Disney with the rest of the family. That prospect should be horrifying for anyone. It would be tough on you, but if those are the consequences, then better to pay and learn now than pay later when the consequences are even greater.

Just a thought, have you talked to your daughter about her plans for her life? I've found that if you can tie the motivation into the kids desire, they often will step up their game. Growing up is not a linear, constant process. Some days, weeks, months, years, are better than others. Consistency and determination in the face of fear, frustration and downright stupidity is how I look at parenting. We somehow survived and our parents did not make all the right decisions. Some kids never get it and they end up going down a horrible road. Most kids, including most of us (20, 30, or even 40 years ago) somehow made it to where we are today. Maybe not as successful as we or our parents had hoped, but we are here and we are doing the best that we can. Teaching our children that there are many ways to measure success is just part of the process.

Keep up the good work Dad!

Be safe.

Mine are 23, 21, and 15, and yes, the 15 year old is a daughter and I feel your pain